package com.episode5;

import java.io.IOException;
import java.util.logging.Logger;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;

public class AccessLogFilter implements Filter {
	
	private static final Logger LOG = Logger.getLogger(AccessLogFilter.class.getSimpleName());

	@Override
	public void destroy() {
	}

	@Override
	public void doFilter(ServletRequest req, ServletResponse res,
			FilterChain chain) throws IOException, ServletException {
		String ip = ((HttpServletRequest)req).getHeader("HTTP_X_FORWARDED_FOR");
		if(null == ip)
			ip = ((HttpServletRequest)req).getRemoteAddr();
		LOG.info(ip);
		chain.doFilter(req, res);
	}

	@Override
	public void init(FilterConfig arg0) throws ServletException {
	}

}
